2) 3x + 8y 51
So, multiplying with 2 we get
6x + 16y 102
Also 6x +4y 48
Subtracting above two equations we get
12y 54
y 4.5
Also 6x + 4(4.5) 48
6x 48- 18 = 30
x 30/6 = 5
P = 2(5) + 3(4.5) = 23.5
so, answer is
p = 23.5
(X,Y) = (3,4.5)
3) 2x + y 80
y + z 80
Adding both we get
2x + 2y +z 160 (1)
Also x + y + z 90
So, 2x +2y +2z 180 (2)
Subtracting (1) from (2), we get
z 20
So, y + 20 80
y 60
And 2x + 60 80
2x 20
x 10
Hence c = 3(10) + 60 + 5(20) = 30+60+100 = 190
Answer is
c = 190
(x,y,z) = (10,60,20)
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